(1) Were the IOs random or sequential?
(2) What is the working set size? Breaking down the question further:
2.A. What was the size of the VMDK used for testing?
2.B. Did IOmeter access the entire VMDK or it accessed only a part of it? If latter, what% of the VMDK was accessed?
(3) In the case of 100% random reads, was the VMDK pre-populated before the reads were issued? Or were the reads coming from a sparse VMDK?
(4) How long did the tests run?
(5) How many physical cores did each host have? What % of the host CPU was consumed by vSAN?

did they also do a relevant VDI style test? 100% reads is good for stats but not very representative for VDI. if performance drops from 2mln to 640k when 100% reads become 70% reads, should I be worried when I put a VDI workload on there?
What would the IOPS be when real world VDI averages are used like a 15/85% R/W with 4kB and 64kB blocks that average at 12kB and are 100% random?